Afriend asks you why sea anemones are not placed in the phylum echinodermata. she says," sea anemones have radial symmetry, so they must be sea stars." "of course you are correct about the radial symmetry in both groups of organisms," you reply. select the best choice for the rest of your response. "however,

a. sea anemones are members of the phylum cnidaria and anyway, they are protostomes, not deuterostomes."
b. echinoderms are only radially symmetrical in their larval forms."
c. sea anemones are diploblastic while sea stars are triploblastic."
d. sea anemones and sea stars are both marines."
e. sea stars are mobile whereas sea anemones are mostly sessile.